Platypus Hoser 1 Liter Helmets Compatible with all Petzl rear

Compatible with all Petzl rear crampon sections to transform them into models designed for technical mountaineering

Upper tuckaway compression straps reduce volume when you're carrying smaller loads

Keystone thumb pattern for maximum dexterity

Compatible as an attachment to several Osprey travel and backpacking bags for additional storage and carry options

Platypus Hoser 1 Liter Helmets Compatible with all Petzl rearThe original Platypus water reservoir that became a backcountry classic, the Hoser is an ultralight, minimalist hydration system that delivers taste free hydration with a versatile, durable design that makes it great for backpacking, thru hiking, and day hikes. Updates include a new self sealing HyFLO bite valve that delivers a 30% increase in flow rate, making it quicker and easier to hydrate on the go. Drink on the go: New simple, one piece, self